+use super::*;
+use io::byteio::*;
+use frame::*;
+use std::io::SeekFrom;
+//use std::collections::HashMap;
+
+enum GDVState {
+ NewFrame,
+ AudioRead,
+}
+
+#[allow(dead_code)]
+pub struct GremlinVideoDemuxer<'a> {
+ opened: bool,
+ src: &'a mut ByteReader<'a>,
+ streams: Vec<Rc<NAStream<'a>>>,
+ frames: u16,
+ cur_frame: u16,
+ asize: usize,
+ apacked: bool,
+ state: GDVState,
+ pktdta: Vec<u8>,
+}
+
+impl<'a> NADemuxer<'a> for GremlinVideoDemuxer<'a> {
+ #[allow(unused_variables)]
+ fn open(&mut self) -> DemuxerResult<()> {
+ let src = &mut self.src;
+ let magic = src.read_u32le()?;
+ if magic != 0x29111994 { return Err(DemuxerError::InvalidData); }
+ let id = src.read_u16le()?;
+ let frames = src.read_u16le()?;
+ let fps = src.read_u16le()?;
+ let aflags = src.read_u16le()?;
+ let rate = src.read_u16le()?;
+ let depth = src.read_u16le()?;
+ let max_fs = src.read_u16le()?;
+ src.read_skip(2)?;
+ let width = src.read_u16le()?;
+ let height = src.read_u16le()?;
+println!("id {} frames {} fps {} sound {} Hz {:X} img {} - {}x{}",id,frames,fps,rate,aflags,depth,width,height);
+ if max_fs > 0 {
+ let vhdr = NAVideoInfo::new(width as u32, height as u32, false, PAL8_FORMAT);
+ let vci = NACodecTypeInfo::Video(vhdr);
+ let vinfo = NACodecInfo::new(vci, None);
+ let vstr = NAStream::new(StreamType::Video, 0, vinfo);
+ self.streams.push(Rc::new(vstr));
+ }
+ if (aflags & 1) != 0 {
+ let channels = if (aflags & 2) != 0 { 2 } else { 1 };
+ let ahdr = NAAudioInfo::new(rate as u32, channels as u8, if (aflags & 4) != 0 { SND_S16_FORMAT } else { SND_U8_FORMAT }, 2);
+ let ainfo = NACodecInfo::new(NACodecTypeInfo::Audio(ahdr), None);
+ let astr = NAStream::new(StreamType::Audio, 1, ainfo);
+ self.streams.push(Rc::new(astr));
+
+ let packed = if (aflags & 8) != 0 { 1 } else { 0 };
+ self.asize = (((rate / fps) * channels * (if (aflags & 4) != 0 { 2 } else { 1 })) >> packed) as usize;
+ self.apacked = (aflags & 8) != 0;
+println!("audio chunk size {}({:X})",self.asize,self.asize);
+ }
+ if max_fs > 0 && depth == 1 {
+ src.read_skip(768)?;
+ }
+ self.frames = frames;
+ self.opened = true;
+ self.state = GDVState::NewFrame;
+ Ok(())
+ }
+
+ #[allow(unused_variables)]
+ fn get_frame(&mut self) -> DemuxerResult<NAPacket> {
+ if !self.opened { return Err(DemuxerError::NoSuchInput); }
+ if self.cur_frame >= self.frames { return Err(DemuxerError::EOF); }
+ match self.state {
+ GDVState::NewFrame if self.asize > 0 => { self.read_achunk() }
+ _ => { self.read_vchunk() }
+ }
+ }
+
+ #[allow(unused_variables)]
+ fn seek(&mut self, time: u64) -> DemuxerResult<()> {
+ if !self.opened { return Err(DemuxerError::NoSuchInput); }
+ Err(DemuxerError::NotImplemented)
+ }
+}
+/*impl<'a> Drop for GremlinVideoDemuxer<'a> {
+ #[allow(unused_variables)]
+ fn drop(&mut self) {
+ }
+}*/
+impl<'a> GremlinVideoDemuxer<'a> {
+ pub fn new(io: &'a mut ByteReader<'a>) -> Self {
+ GremlinVideoDemuxer {
+ cur_frame: 0,
+ frames: 0,
+ opened: false,
+ asize: 0,
+ apacked: false,
+ state: GDVState::NewFrame,
+pktdta: Vec::new(),
+ src: io,
+ streams: Vec::new()
+ }
+ }
+
+ fn find_stream(&mut self, id: u32) -> Rc<NAStream<'a>> {
+ for i in 0..self.streams.len() {
+ if self.streams[i].get_id() == id {
+ return self.streams[i].clone();
+ }
+ }
+ panic!("stream not found");
+ }
+ fn read_achunk(&mut self) -> DemuxerResult<NAPacket> {
+ self.state = GDVState::AudioRead;
+ let str = self.find_stream(1);
+ self.src.read_packet(str, Some(self.cur_frame as u64), None, None, true, self.asize)
+ }
+
+ fn read_vchunk(&mut self) -> DemuxerResult<NAPacket> {
+ let str = self.find_stream(0);
+ let mut src = &mut self.src;
+ let magic = src.read_u16be()?;
+ if magic != 0x0513 { return Err(DemuxerError::InvalidData); }
+ let size = (src.read_u16le()? as usize) + 4;
+ let tmp = src.read_u32le()?;
+ let flags = (tmp & 0xFF) as usize;
+ src.seek(SeekFrom::Current(-4))?;
+ self.state = GDVState::NewFrame;
+ self.cur_frame = self.cur_frame + 1;
+ src.read_packet(str, Some((self.cur_frame - 1) as u64), None, None, if (flags & 64) != 0 { true } else { false }, size)
+ }
+}
+
+#[cfg(test)]
+mod test {
+ use super::*;
+ use std::fs::File;
+
+ #[test]
+ fn test_gdv_demux() {
+ let mut file = File::open("assets/intro1.gdv").unwrap();
+ let mut fr = FileReader::new_read(&mut file);
+ let mut br = ByteReader::new(&mut fr);
+ let mut dmx = GremlinVideoDemuxer::new(&mut br);
+ dmx.open().unwrap();
+ loop {
+ let pktres = dmx.get_frame();
+ if let Err(e) = pktres {
+ if (e as i32) == (DemuxerError::EOF as i32) { break; }
+ panic!("error");
+ }
+ let pkt = pktres.unwrap();
+ println!("Got {}", pkt);
+ }
+ }
+}